document.getElementById('home').addEventListener('tap', function() {
  mui.openWindow({
    url: 'index.html', 
    id:'home'
  });
});
document.getElementById('fenlei').addEventListener('tap', function() {
  mui.openWindow({
    url: 'cate.html', 
    id:'fenlei'
  });
});
document.getElementById('paim').addEventListener('tap', function() {
  mui.openWindow({
    url: 'renqi.html', 
    id:'paim'
  });
});
document.getElementById('user').addEventListener('tap', function() {
  mui.openWindow({
    url: 'person.html', 
    id:'user'
  });
});